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Jet substructure observables provide unique probes of the properties of theQuark-Gluon Plasma (QGP). In these proceedings we report new measurements ofgroomed jet substructure in central Pb-Pb collisions at$\sqrt{s_\mathrm{NN}}=5.02$ TeV. We present the first application of dynamicalgrooming in heavy-ion collisions to search for excess $k_{\mathrm{T,g}}$emissions, which is a signature of large-angle scattering of jets offquasi-particles in the QGP. We present additional measurements employing boththe soft drop and dynamical grooming algorithms in 0-10% central Pb-Pb, 30-50%semicentral Pb-Pb, and proton-proton (pp) collisions at$\sqrt{s_{\mathrm{NN}}}=5.02$ TeV. Results from the various grooming methodsand parameters are compared. Comparisons to model calculations are alsopresented. The techniques developed for this measurement are more broadlyapplicable to jet substructure, which we likewise discussed.

Exploring medium properties with hard transverse momentum splittings using groomed jet substructure measurements in Pb--Pb collisions with ALICE